Clamp



FIG. 1 is a front perspective view of a clamp showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a reduced top, front and right side perspective view thereof.

The broken line showing of awning post and the boat rail and grill are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a clamp, as shown and described. 